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Cookies policy

The registered user consents to the use of cookies. This web site uses only uses cookies which are strictly necessary for the correct operation of the page and to compile web usage statistics, and does not gather personally identifiable information about the user. By using the website you grant us permission to store the traces left by your IP address in order to manage the system, improve the effectiveness of the page and make general statistical studies, as a security measure and to fulfil our legal liabilities. You may accept or reject cookies in your browser settings, you can receive notifications on your screen when you receive cookies to prevent installation on your hard drive, and you can delete cookies that have already been installed. Cookie settings are different from browser to browser so we recommend you check the "Options" or "tools" menu of your Web browser to set your security and cookies authorisation levels. If you do not allow cookies, some aspects of the website may not work correctly.


A cookie is a small text file that is stored in your browser when you visit almost any web page. It enables the website to remember your visit when you return to browse the page. Cookies commonly store information of a technical nature, personal preferences, customization of content, usage statistics, links to social networks, access to user accounts, etc. The purpose of the cookie is to adapt the content of the website to your profile and needs, therefore, without cookies the services offered by any page are diminished significantly.

What kind of information do cookies store?

Cookies dp not usually store sensitive information about you such as credit cards or bank details, photographs, your ID number or personal information, etc. The data saved are of a technical nature, personal preferences, personalisation of content, etc.

The web server does not associate you as a person, rather as your web browser. In fact, if you regularly surf with Internet Explorer and try browsing the same website with Firefox or Chrome you will notice that the website does not realise that you are the same person because it is actually associating the browser, not the person.

What kind of cookies are there?

Technical cookies: are the most elementary and show, among other things, when a human or an automated application is browsing, when an anonymous user is browsing, basic tasks for the operation of any dynamic website.
Analytical Cookies: These gather information about the type of browsing, the sections you use most, products consulted, time zone of use, language, etc.
advertising cookies: These display advertising based on your browsing habits, your country of origin, language, etc.

What are proprietary cookies and third party cookies?

Proprietary cookies are those generated by the page you are visiting and third party cookies are those generated by services or external providers such as Facebook, Twitter, Google, etc.

Cookies used on this website

Following the guidelines of the Spanish Data Protection Agency, the following is a list of cookies used by this website in order to provide you with the most accurate information possible.

This website uses the following third party cookies:
Google Analytics: It stores cookies in order to compile statistics on the traffic and volume of visits to this website. By using this website, you consent to the processing of data about you by Google. Therefore, to exercise of these rights you must communicate directly with Google.

Can cookies be deleted?

Yes. Not only can you delete them, but you can also block them, generally or for a specific domain.
To delete cookies from a website, use your browser settings and search for the cookies associated with the domain in question and delete them.

Disabling or deleting cookies

All browsers have options that enable users to disable cookie settings. You may exercise your right to disable or delete cookies from this web site at any time. How to do this differs depending on the browser you are using. Here is a quick guide to the most popular browsers.

Updates to the Cookies Policy

We may change this cookies policy based on legislative or regulatory requirements, or to adapt the policy to the guidelines issued by the Spanish Data Protection Agency, so users are advised to visit it periodically.

When there are significant changes to this Cookies Policies, Users will be notified on the website.

Additional notes

  • Neither this website nor its legal representatives are responsible for the content or the accuracy of the privacy policies of any third parties mentioned in this cookies policy.
  • Web browsers are the tools in charge of storing cookies and from this place you have the right to delete or deactivate them. Neither this website nor its legal representatives can guarantee the correct or incorrect handling of cookies by the aforementioned browsers.
  • In some cases it is necessary to install cookies so that the browser does not forget its decision not to accept them.
  • In the case of Google Analytics cookies, Google Analytics stores cookies on servers located in the United States and undertakes not to share them with third parties, except where necessary or required by law for the operation of the system. According to Google, it does not save your IP address. Google Inc. is a company that adheres to the Safe Harbor Agreement and guarantees that all data transferred will be treated with a level of protection in accordance with European standards. You can find detailed information on this subject at this link. If you would like information about Google’s use of cookies, please click on the following link.https://www.google.es/intl/es-ES/policies/technologies/cookies/
  • Enter your email and password to access the private area.
    As a teacher, you may update the participation details of the school and groups, and upload work,
    and also download all the teaching materials for the 35th ONCE Competition for Schools.

Cookies settings for the most popular browsers

Here are instructions for accessing a specific cookie using the Chrome browser. Note: these steps can change according to the browser version:

  • Go to Settings or preferences in the File menu or by clicking on the customisation settings at the top right.
  • You will see different settings, click on the Advanced settings option.
  • Under "Privacy and security," click Content settings.
  • Select all the cookies and data of the sites.
  • A list will appear, with all the cookies arranged by name. To make it easier to find the cookies of a certain domain, enter the address or part of it in the Search cookies field.
  • After using your filter, one or several lines with the cookies of the website requested will appear. Now all you need to do is select them and click on the X to delete them.

To access the cookies from the Internet Explorer browser, follow these instructions. These may vary according to the version of the browser.

  • Go to Tools, Internet Options
  • Click on Privacy.
  • Slide the slider to the level of privacy you want.

To access the cookies from the Firefox browser, follow these instructions. These may vary according to the version of the browser.

  • Go to Options or Preferences according to your operating system.
  • Click on Privacy.
  • Select a personalised configuration in history.
  • Choose the Accept Cookies option to activate or disable them to your preferences.

  • Go to preferences, then Privacy.
  • Choose Block cookies to select how you wish to block the cookies.

To access the cookies from the Safari browser, follow these instructions. These may vary according to the version of the browser.

  • Go to settings, then Safari.
  • Go to Privacy and Security, you will see the Block cookies option where you can choose which cookies you want to block.

To change the settings on Android devices, follow these instructions. These may vary according to the version of the browser.

  • Launch the browser and click the menu button, then settings.
  • Go to security and privacy, and activate or disable the accept cookies option.

To change the settings on Windows phone devices, follow these instructions. These may vary according to the version of the browser.

  • Open Internet Explorer, then More, then Settings
  • Once here you can activate or disable the Allow cookies box.